91684867 has 2 divisors, whose sum is σ = 91684868. Its totient is φ = 91684866.

The previous prime is 91684847. The next prime is 91684903. The reversal of 91684867 is 76848619.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91684867 is a prime.

It is a super-2 number, since 2×91684867² = 16812229673615378, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91684867.

It is not a weakly prime, because it can be changed into another prime (91684807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45842433 + 45842434.

It is an arithmetic number, because the mean of its divisors is an integer number (45842434).

Almost surely, 2^91684867 is an apocalyptic number.

91684867 is a deficient number, since it is larger than the sum of its proper divisors (1).

91684867 is an equidigital number, since it uses as much as digits as its factorization.

91684867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 91684867 is about 9575.2215117980. The cubic root of 91684867 is about 450.9197107825.

The spelling of 91684867 in words is "ninety-one million, six hundred eighty-four thousand, eight hundred sixty-seven".